cs8900.c

含有完整TCP/IP PPP协议的嵌入式操作系统

/*
 * Copyright (C) 2002-2003 by Call Direct Cellular Solutions Pty. Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgement:
 *
 *    This product includes software developed by Call Direct Cellular Solutions Pty. Ltd.
 *    and its contributors.
 *
 * THIS SOFTWARE IS PROVIDED BY CALL DIRECT CELLULAR SOLUTIONS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CALL DIRECT
 * CELLULAR SOLUTIONS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * For additional information see http://www.calldirect.com.au/
 *
 * -
 * Copyright (C) 2001-2003 by egnite Software GmbH. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgement:
 *
 *    This product includes software developed by egnite Software GmbH
 *    and its contributors.
 *
 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * For additional information see http://www.ethernut.de/
 *
 * -
 * Portions Copyright (C) 2000 David J. Hudson <[e-mail]>
 *
 * This file is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You can redistribute this file and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software Foundation;
 * either version 2 of the License, or (at your discretion) any later version.
 * See the accompanying file "copying-gpl.txt" for more details.
 *
 * As a special exception to the GPL, permission is granted for additional
 * uses of the text contained in this file.  See the accompanying file
 * "copying-liquorice.txt" for details.
 * -
 * Portions Copyright (c) 1983, 1993 by
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * -
 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies, and that
 * the name of Digital Equipment Corporation not be used in advertising or
 * publicity pertaining to distribution of the document or software without
 * specific, written prior permission.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

/*
 * $Log: cs8900.c,v $
 * Revision 1.1  2005/07/26 18:02:27  haraldkipp
 * Moved from dev.
 *
 * Revision 1.9  2005/04/30 16:42:41  chaac
 * Fixed bug in handling of NUTDEBUG. Added include for cfg/os.h. If NUTDEBUG
 * is defined in NutConf, it will make effect where it is used.
 *
 * Revision 1.8  2004/05/26 09:40:30  olereinhardt
 * Changed reading of packet length / receive status to be compatible with
 * newer AVRGCC versions. (Need to read high byte first!)
 *
 * Added software reset / wakeup routine to init code. (only avalilable in new code)
 *
 * Revision 1.7  2004/05/25 11:39:47  olereinhardt
 * Define NUT_CS8900_OLD to get the old functionality back again
 *
 * Revision 1.6  2004/05/24 17:09:17  olereinhardt
 * Changed base address handling in cs8900.c and moved cs8900.h to /include/dev
 * Base address can now be passed to the nic driver by NutRegisterDevice.
 * Removed some Assembler code in cs8900.c
 *
 * Added some databus waitstate settings for the upper half of the address space in os/arch/avr_nutinit.c. Now three waitstates are default for 0x8000-0xFFFF
 *
 * Added terminal device driver for hd44780 compatible LCD displays directly
 * connected to the memory bus (memory mapped). See hd44780.c for more information.
 * Therefore some minor changed in include/dev/term.h and dev/term.c are needet to
 * pass a base address to the lcd driver.
 *
 * Revision 1.5  2004/03/18 14:06:52  haraldkipp
 * Deprecated header file replaced
 *
 * Revision 1.4  2003/10/13 10:13:49  haraldkipp
 * First release
 *
 * Revision 1.3  2003/08/05 20:11:30  haraldkipp
 * Removed from ICCAVR compilation
 *
 * Revision 1.2  2003/07/20 20:07:38  haraldkipp
 * Conflicting Ethernet driver routine names solved.
 *
 * Revision 1.1  2003/07/20 16:37:21  haraldkipp
 * CrystalTek 8900A driver added.
 *
 *
 * Revision 1.0  2002/03/28 MJC CDCS
 * Created
 *
 * Revision 1.1  2003/03/25 MJC CDCS
 * Modified behaviour when transmit buffer space unavailable
 *
 */

/* Not ported. */
#ifdef __GNUC__

#include <cfg/os.h>
#include <string.h>
#include <avr/interrupt.h>

#include <sys/heap.h>
#include <sys/thread.h>
#include <sys/event.h>
#include <sys/timer.h>
#include <sys/confnet.h>

#include <dev/nicrtl.h>
#include <netinet/if_ether.h>
#include <net/ether.h>
#include <net/if_var.h>
#include <netinet/ip.h>

#include <dev/irqreg.h>
#include "cs8900.h"

#ifdef NUTDEBUG
#include <sys/osdebug.h>
#include <net/netdebug.h>
#endif

/*!
 * \addtogroup xgNicCs8900
 */
/*@{*/


// Ethernet flags byte
// Bit 0 = transmit byte flag
u_char cs_flags;
volatile u_short cs_base = 0x0000;


void CSWrite16(u_short addr, u_short data)
{
    u_short *p;

    p = (u_short *) addr;
    cli();
    *p = data;
    sei();
}

void CSWritePP16(u_short addr, u_short data)
{
    u_short *p;

    cli();
    p = (u_short *) CS_PP_PTR;
    *p = addr;

    CSWrite16(CS_PP_DATA0, data);

    return;
}

u_short CSRead16(u_short addr)
{
    u_short *p;
    u_short d;

    cli();
    p = (u_short *) addr;
    d = *p;
    sei();

    return d;
}

u_short CSReadPP16(u_short addr)
{
    u_short *p;

    cli();
    p = (u_short *) CS_PP_PTR;
    *p = addr;

    return CSRead16(CS_PP_DATA0);
}

u_long CSReadPP32(u_int addr)
{
    u_long l;
    u_long *p;

    cli();
    p = (u_long *) CS_PP_PTR;
    *p = addr;
    p = (u_long *) CS_PP_DATA0;
    l = *p;
    sei();

    return l;
}



void CSBeginFrame(void)
{
    cs_flags &= ~1;
}

void CSEndFrame(void)
{
    u_char *p;

    cli();
    p = (u_char *) CS_DATA_P0 + 1;
    sei();

    // If odd number of bytes in packet pad it out
    if (cs_flags & 1)
        p = 0;
}

void CSWriteFrameByte(u_char data)
{
    u_char *p;

    if (cs_flags & 1)
        p = (u_char *) CS_DATA_P0 + 1;
    else
        p = (u_char *) CS_DATA_P0;

    *p = data;